Hello Ayran,
happy new year also all other E85 riders!
BX-Ethanol newsflash:
@idle:
Since the exhaust gas test (early December of 2007) and changing ECU and maybe 'finding' the crazy contact/part in harness the engine runs fine at idle.
@E81:
Before chrismas the tank was so empty that filling up with E85 caused E81. Engine run very lean and poor. We did a trip up in the 'mountains' and I had problems to reach 100km/h on the highway in (longer) 4th gear. Sometimes I had to use the (longer) 3rd at nearly 5000rpm.
(Some years ago I passed this section of highway with a modified Dyane at WOT just a little bit slower.)
@E57:
On chrismas day my wife had to use the car for the next trip (2x60km) so I filled up outdated gas/petrol. --> E57 in tank. I wanted to avoid any 'marital crisis' during holidays.
I went the distance by my dailydriver bicycle.
(During this trip the speedometer cable 'broke' down - no speedo, no km gauge. Luckily the Sigma BC08 logged the distance.
Maybe the bad working (swinging needle) km gauge is/was the reason of high fuel consumption and the non reproductive deviation between Sigma BC08 and OEM km gauge.)
Engine runs much better than with E81. Of course I can use it but it was not comfortable to drive (city, hills)
I checked the exhaust gas by another garage (Peugeot), the engine was warmed up during 6km cruising plus ~2km forcing against a virtual mountain' (=breaks). The surprising result was:
2020rpm (no load)
CO 0,44%
CO2 14,0%
HC 0(!)ppm
O2 0,6%
lambda 1,007
I was happy to see low/no HC emissions but CO was too high (0,30% limit). Unfortunality I forgot to ask for a print at idle (800-1000rpm). HC was good, but I have no idea about CO number (limit at idle would be 0,50%)
aryan skrev:
With E85 it takes longer before an (old) cat gets hot enough but I suppose you did drive the ca a little harder to get it hot before testing. High HC could be something else as the cat too, in my silver arrow a new metal non ceramic cat (80 euro at biltema) got the HC down enough but raised CO above acceptable levels
Ayran, could you tell me some of your HC and CO emissons at ~2000rpm?
What's the difference between Ethanol and petrol? I heard that Ethanol emissions are better but I have no idea how much is the difference of each exhaust.@ignition:
The spark advance is 10°BTDC at idle - as ist should.
@PSA TDC-sensor:
I tried to find out spark advance with soundcard and laptop. The BX voltage is high enough to charge the laptop battery --> I'm able to play around.
But I couldn't get a 'clean' signal of the TDC sensor. The mechanic had also no idea (and manual) about this old fashioned sensor. It's not a common inductive senor because it's not able to trigger an ignition module (Ford EDIS) which needs an inductive senor (magnetic is felt) (I learnde the hard way). There are three wires: one shielding and 2 signal wires. I can't believe that it is a Hall sensor.
@Bigger Mono jentronic injector:
Before I checked emissions I visited a scrapyard and found an injector of a 1.8l VAG engine (Audi 80). BOSCH 0 280 150 069 with 812ccm/min, the OEM injector 0 280 150 669 makes 714ccm/min (+14%) (
http://www.injectorcleaning.co.uk/flow.htm ). At home I had to learn that not all injectors are interchangeable. The VAG injector was much wider near the nozzle than the PSA injector. The plug was alos different, but I picked up the VAG plug too.
A guy told me that the upper part of the TBI is interchangable often --> I had had to remove this too.
@Higher pressure:
So I raised the fuel pressure just to put in 2 washers (~2mm?). Fuel pressure raised from OEM 16,5PSI up to 30PSI (engine off, fuel pump on). sqrt(30/16,5) = +35%
When fuel line is 'turned off', the pressure is 32PSI --> 30PSI is near 'zero volume hight/pressure' (highest pressure but no flow).
I have no idea if the pump is able to feed 30PSI also at WOT. I'm afraid not. The engine is really easy to start (0...-5°C tested) but I can't say that engine runs much better than with OEM pressure. No DMM was connected at O2 sensor to proof my feeling.
I picked up the VAG fuel pressure regulator too, but I lost the spring. A guy told me that the pressure is not higher than at PSA TU engines.
aryan skrev:
Btw in my silver arrow I think I've found the or just one cause of high HC/CO and lambda: The injector O-rings (keeping it inside the throtle body) were a bit hard (and old) and when I increased fuel pressure without the engine running I could see that it leaked there(!) Of course it is hard to keep HC and CO down then..
I checked the injector after increasing the pressure and saw no drops. But it was late in the evening so I didn't spend much time. I will check it at cold not running engine too.
»Horst